Rattling my cage

Ok so here goes first time post as I recently just got forced into buy a prius for my wife.
The prius in question is a 2015 prius v with ~160k miles

We purchased the vehicle a couple months back after our son totalled out 2012 tsx , my wife found this car at a local smaller car lot and fell in love with it.

There was a CEL on whe. We purchased it it was for an 02 sensor which I quickly replaced and all was well for a few weeks. Then the CEL came on again for a misfire on cylinders 3,4 .... so the weekend came around and I decided to pull the plugs for and inspection all seemed in fairly poor condition and since it was a small pain to get to them I decided to replace the coils as well hopefully to not just have to do it in another week or if it didn't resolved the codes...
The car drove fine for around another week no CEL then again with misfire on 1 and 4 so that weekend I rechecked all the plugs and decided to check the intake since it's a know issue on them and replace the pvc valve while I was there pull intake cleaned as best as I could since it was pretty bad used 3 cans of parts cleaner, and decided to replace the injectors since the ones in it looked to be original from factory. The shake on start up was gone and no lights for a fee more days and again misfire codes... I can't remember the cylinders this time... so after more research here on the forum decided come the weekend to check the egr pipe,valve,cooler.



There was alot of carbon build upto soaked everything minus the electronic connectors etc in berrymans cleaners and it did a wonderful job cleaning everything rinsed with ro/di water then allowed toa ir dry for 2 days and painfully reassembled everything.

Now it has developed a "sputter" as I'm gonna call it when you barely touch the accelerator, and after 20-30 mins running throws misc cylinder misfire codes all different... I have un hooked the egr system plug cleared codes and the only code it throws of coarse is for the egr system... but no misfires no sputtering runs amazing...

I ordered a new egr valve, my thinking is maybe there's something wrong with the magnetic part of the egr valve causing issues but I'm at my whits end trying to figure this thing out any help or shops people can recommend columbus ohio would be greatly appreciated.

 

These are pics before and after cleaning egr valve